Setting custom NPM_USER_CONFIG with readonly NPM_TOKEN via Powershell (Tested in TeamCity)

script.ps1

# Write NPM_TOKEN registry without BOM @see https://stackoverflow.com/a/32951824
[IO.File]::WriteAllLines("$(Get-Location)\.npmrc", "//registry.npmjs.org/:_authToken=$env:NPM_TOKEN")

# Set Custom NPM_CONFIG_USERCONFIG Environment variable
$env:NPM_CONFIG_USERCONFIG="$(Get-Location)\.npmrc"

# debug who you are 
# npm whoami

# replace * with the npm script you want to run. 
npm run *

# Remove Custom NPM_CONFIG_USERCONFIG Environment variable
Remove-Item Env:NPM_CONFIG_USERCONFIG